Add discussion link in README.md

Mercurio · Mercurio · commit 7465bb94e4b3 · 2022-04-11T21:55:11.000+08:00
diff --git a/README.md b/README.md
@@ -34,3 +34,4 @@ php flarum cache:clear
 
 - [Packagist](https://packagist.org/packages/ecnu-im/sticky-sidenav)
 - [GitHub](https://github.com/ECNU-Forum/sticky-sidenav)
+- [Discuss](https://discuss.flarum.org/d/30579-sticky-sidenav)

Original file line number	Diff line number	Diff line change
`@@ -34,3 +34,4 @@ php flarum cache:clear`
`34`	`34`
`35`	`35`	`- [Packagist](https://packagist.org/packages/ecnu-im/sticky-sidenav)`
`36`	`36`	`- [GitHub](https://github.com/ECNU-Forum/sticky-sidenav)`
	`37`	`+- [Discuss](https://discuss.flarum.org/d/30579-sticky-sidenav)`